Anxiety and depression are two conditions that few of us will escape in life. While sometimes the etiology is unclear, anxiety and depression can be triggered by traumatic life experiences, chronic stress, caregiver responsibilities, chronic health conditions, drugs and alcohol – to name a few. But can anxiety, depression and overall mood also be triggered by our dietary habits and overall nutrition? Conversely, are there certain foods that can positively effect our mood and behavior? In other words, do certain foods have natural anxiolytic and antidepressant abilities?
Well to address the first question, a diet high in refined carbohydrates (white rice, white bread, pop, donuts, pastries) causes sharp elevations then sharp drops in blood sugar. In addition to screwing up the regulation of insulin, this can lead to a decrease in energy, irritability and a general feeling of yuck. But it’s even worse than that. Diets high in refined sugars are actually harmful to the brain. There are many studies concluding that refined sugar impairs brain function, contributes to and even worsens mood disorders like depression.
Junk, fried and processed foods (fast foods, frozen meals, processed meats) have been the focus of many studies. It appears as though these foods alter gut bacteria which effects the immune system and leads to inflammation throughout the body and brain. This chronic inflammation has widely been tied to poorer mental health in adults and children and most notably depression. The SMILES trial of 2017 (Supporting the Modification of Lifestyle in Lowered Emotional States) compared the effect of eating an anti-inflammatory diet to supportive counseling in 67 patients diagnosed with depression. The conclusion was the patients who received the dietary intervention showed a significantly greater improvement compared to the counseling group.
So to address the second question. Diets high in anti-inflammatory type foods (nuts, whole grains, fruits, vegetables and oily fish) are known to balance neurochemicals within the brain and help to regulate mood and cognition. Antioxidant nutrients such as vitamin C and E as well as natural plant compounds reduce free radical damage to the brain which effects mental health. Folic acid, a B vitamin found in legumes, green leafy vegetables, asparagus, beets, brussel sprouts, broccoli, nut and seeds, bananas, papaya, blueberries, fortified grains and yeast, is necessary for the production of serotonin which is a brain chemical responsible for mood regulation.
In my research on specific plants that have been studied for their effect on mood I found the following interesting information. The National Institute of Health (NIH) published a study on PARSLEY with this conclusion:
“Parsley, a culinary herb used worldwide, presents enormous health benefits and through this study it has been known to have remarkable antidepressant and anxiolytic activity especially in the dose of 100mg/kg body weight. In the search for an effective medicine with few or no side effects parsley could be a well-placed alternative.” The study encourages daily consumption. I love how they classify parsley as a medicine!
According to the Journal of Ayurveda and Integrative Medicine, BASIL has anti-anxiety and anti-depressant properties that are comparable to diazepam (valium) and antidepressant medications. People who took 500mg of basil extract each day felt less anxious, stressed, depressed and more social. This is one of the reasons I have a huge valium basil plant in my house!
An article written in Scientific Wellness states BLUEBERRIES have been shown to have a positive effect on mood within two hours after consumption. Blueberries increase blood flow to the brain, increase monoamine oxidase which is an enzyme needed to produce serotonin and dopamine and binds to benzodiazapine receptors for anti-anxiety effects. I eat a half a cup of blueberries every day – that’s right – 7 days a week for this very reason.
While prescription medication certainly has its place in cases of diagnosed clinical depression and anxiety, sometimes all that is needed is a prescription for good nutrition. The food-mood connection is not hokey pokey. Nutritional psychiatry is a very real thing. We are what we eat and also what we don’t eat!
https://pubmed.ncbi.nlm.nih.gov/28137247/
https://pubmed.ncbi.nlm.nih.gov/33916097/
https://www.scientificwellness.com/blog-view/blueberries-improve-mood-within-hours–597